#ifndef CONVERSION_H_62B23520_7C8E_11DE_8A39_0800200C9A66
#define CONVERSION_H_62B23520_7C8E_11DE_8A39_0800200C9A66

#if defined(_MSC_VER) || (defined(__GNUC__) && (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4)) // GCC supports "pragma once" correctly since 3.4
#pragma once
#endif

#include "yaml-cpp/null.h"
#include "yaml-cpp/traits.h"
#include <limits>
#include <string>
#include <sstream>

namespace YAML {
// traits for conversion

template<typename T>
struct is_scalar_convertible {
	enum {
		value = is_numeric<T>::value
	};
};

template<> struct is_scalar_convertible<std::string> {
	enum {
		value = true
	};
};
template<> struct is_scalar_convertible<bool> {
	enum {
		value = true
	};
};
template<> struct is_scalar_convertible<_Null> {
	enum {
		value = true
	};
};

// actual conversion

inline bool Convert(const std::string& input, std::string& output) {
	output = input;
	return true;
}

YAML_CPP_API bool Convert(const std::string& input, bool& output);
YAML_CPP_API bool Convert(const std::string& input, _Null& output);

inline bool IsInfinity(const std::string& input) {
	return input == ".inf" || input == ".Inf" || input == ".INF"
			|| input == "+.inf" || input == "+.Inf" || input == "+.INF";
}

inline bool IsNegativeInfinity(const std::string& input) {
	return input == "-.inf" || input == "-.Inf" || input == "-.INF";
}

inline bool IsNaN(const std::string& input) {
	return input == ".nan" || input == ".NaN" || input == ".NAN";
}

template<typename T>
inline bool Convert(const std::string& input, T& output,
		typename enable_if<is_numeric<T> >::type * = 0) {
	std::stringstream stream(input);
	stream.unsetf(std::ios::dec);
	if ((stream >> output) && (stream >> std::ws).eof())
		return true;

	if (std::numeric_limits<T>::has_infinity) {
		if (IsInfinity(input)) {
			output = std::numeric_limits<T>::infinity();
			return true;
		} else if (IsNegativeInfinity(input)) {
			output = -std::numeric_limits<T>::infinity();
			return true;
		}
	}

	if (std::numeric_limits<T>::has_quiet_NaN && IsNaN(input)) {
		output = std::numeric_limits<T>::quiet_NaN();
		return true;
	}

	return false;
}
}

#endif // CONVERSION_H_62B23520_7C8E_11DE_8A39_0800200C9A66
